Combination jolt-ramming and stripping machine.



W. C. NORCROSS.

COMBINATION JOLT RAMMING AND STRIPPING MACHINE.

APPucATlo'fi FILED AUG.30. 1912.

00 m 1 L41 9. n 1 0w a u= A E n2 8 t a P witnesses ED STATES PATI 0111 1011.

WILLIAM c. Noncaoss, or 'rEImE IIAU'rE, INDIANA, AssIoNon T AmnaIcAN MOLDING MACHINE 00., or means HAU'I'E, INDIANA, A coRronATIoN or INDIANA.

COMBINA'IION J' OLT-RAMMIN G AND STRIPPIIG- MACHINE.

Specification of Letters Patent.

Patented Aug. 6, 1918.

Application filed August 30, 1917.. Serial No. 188,995.

TO all whom; it may concern.-

Be it known that I, WILLIAM C. Noncnoss,

a citizen of the United States, residing at.

Terre Haute, county of Vigo, and State of Indiana, have invented certain new and useful Improvements in Combination Jolt- Ramming and Stripping Machines, of WhlCh the following is a specification.

I stripping'means, such as stripping posts, carried by the jolting table and arranged the table.

This invention relates to those molding machines which are adapted to ram the mold by j'olting action and to draw' and strip the pattern from the rammed mold.

One of the objects of my invention is to provide a novel arrangement and 'combina tion of jolting table, flask support, and

for utilization to support the' flask so that the pattern may be drawn and stripped from the rammed mold by the descent of My improvement entirely dis= penses with the necessity for rocking the mold over preparatory to drawing the pattern, or, using auxiliary cylinders or means for operating the stripping posts such as have heretofore been proposed. a

In carrying out the fore 'oing object, I emplo strippingposts carried by the jolting ta le, a stripping plate which supports the flask, and means which may be arranged to support the postsso that they will hold the stripping plate and flask in elevated position, to permit the table and'pattern to be lowered in relation to the aforesaid parts, thereby drawing the pattern and strip- Another object is to provide stripping g'eosts, carried by; the j olting table, which can A still further object is the provision ofimproved abutment or supporting means for the stripping posts and for guarding them inmyPatents 1,031,084; 1,194,059; 1,231,187; 1,224,407 and application Serial No. 126,846,

to prevent access of sand thereto.

A further object is to provide, in 'a joltramming pattern drawing and stripping machine, means adapted to start the table and pattern to draw from the mold so thatif the gravital action is insuflicient to overcome the friction between the pattern and the mold, said mea s will start the draw.

The embodiment of the invention which is as illustrative, rather than restrictive, of the scope of the invention, as modifications may be resorted to without departing from the principles of the invention.

In the accompanying drawings:

Figure 1 is a vertical section, certain parts being in full lines, showing the piston and table down and mold rammed;

Fig. 2 is a section on line '22, Fig. 1, showmg the arrangement of stripping post supports and their operating means;

Fig. 3 is a view similar to Fig. 1, showing the flask and mold supported in elevated position by the stripping posts, the table and pattern having partially descended, after thei drawing of the pattern from the mold;

Figs. 4 and 5 are detail sections on. lines 44 and 5 5- respectively of Fig. 3.

'The base 1 supports a cylinder 2 in which is a piston 3 having a valve 4 which controls the up and down jolting of the piston, the

valve being adapted to strike the pins 5 to prevent it from lockingbelow its normal position as shownin 'Fig. 1. A pipe 6 having valve 7 admits suitable air pressure for the elevation of the piston, with its load, and

a pipe'8 provided with valve 9, lets 01f the exhaust. There being provided an opening 10' in the bottom of the. piston 3, it is unnecessary to provide the separate air supply pipe .11 having three-way valve 12 but this may Ice-employed, for convenience of operation, if desired, in elevating'the piston to the stripping position and in controlling the descent of the piston in drawing mold.

The valve 4 is set forth and claimed in another application executed of even date herewith; it is not' necessary .to use "said valve in conection with my present inprovements as the valve may be used on any jolt ramming machine and is particularly adapted for use on machines having cylinders of small diameter where valves such as shown iston 3 as in In earlier -machines. Car

ried by .the head of piston 3 is a guide pin 14 operating in a guide 15 for the purpose hereinafter set forth is to be considered of preventing the piston from turning. The piston also -carries a stop bolt 16- which slides through an opening in the flange or head 17 0f the cylinder 2 and carriesa sleeve 18 which rests on a washer and nut 19 and contains a coil spring 20 whose upper and projects above the cup. The spring 20 ishave been supported as shown in Fig. 3,.

preparatory to descent of the iston to draw, if the gravital action is insu cienathe expansion of the spring 20 will start the draw. In Fig. 3 the pattern has been substantially drawn and the spring 20 has descended so that it is out of contact with the head 17.

The safety bolt and stop just described is substantially similar to that set forth in my application, for combination jolt-ramming and rock-over machine, Serial No. 185,471, filed August 10, 1917, but in the present invention, the safety bolt serves a different function than served in the machine of the said application. i

Rising from the base 1 are tubular housings 21. Three or more of the housings will be used, according to the size of the machine. Preferably, four housings are employed, the

number being dependent on the shape of the stripping plate which is shown at 22. Usually, the stripping plate 22 is rectangular and there are four housings 21 arranged below the table 13 in line with the four corners of the plate 22. In any instance, the number of housings is determined by the number of the stripping posts 23 which are employed, these being dependent in turn, upon the shape of the stripping plate. The housings 21 are adapted to freely receive the stripping posts 23 except when the stripping posts are supported in the manner shown in Fig. 3. The table 13 is provided with vertical openings 24 in any of which the stripping posts 23 may be dropped, the heads 25 of the stripping posts normally lying in countersinks 26 in the upper face of the table 13. By disposing the stripping posts 23 in one set of the openings 24,. the stripping posts are adapted to support a given size of stripping plate 22 and by placing the posts in other openings 24, the posts are adapted to support another size of stripping plate 22.

24, theycan be quickly lifted out of one set table slide in relation to them when the pattern is being'drawn as shown in Fig. 3.

The heads 27 of the housings 21 have openings 28 in line with the openlngs'24, 24,

for the reception of the stripping posts 23.

The posts are thus guided into the housings and, in addition, sand isv prevented from get-' ting into the housings.

Pivoted at 29 to the heads 27 are supports 30 for covering or closing the heads 27 when the posts 23 are to be supported as ,shown in Figs. 3 and 4, said supports then covering the openings 28. The supports 30 may be coupled in pairs by pull rods 31.

The flask 32 is supported by the stripping plate 22 and secured thereto by dowels 33; trunnions 34 may be provided on the flask to enable the flask to be lifted off, or, if the flask is light enough, it may have handles 1 to be directly grasped by the operators.

The flask may have bars 35 to assist in carrying the sand 36.

The pattern 37 is secured to the table 13 by lag screws 38. The stripping plate 22 conforms to the contour of the pattern 37 as usual.

Operation: The pattern 37 is first secured to the table 13 and the stripping plate 22.

placed around it and on the table. The flask 32 is then placed on the stripping plate 22 and secured by dowel pins 33. The sand 36 is then filled into the flask. Having opened the valves 8 and 9, the piston 3 rapidly jolts or vibrates the table 13 up and down, thus ramming or packing the sand around the pattern and forming the mold. The valve 9 is now closed. If the pipe 11 and valve 12 are used, the valve 7 will be closed but pipe 11 and valve 12 need not be used and if they are omitted, the elevation of the pistonwill be controlled by valve 7. Air is admitted, causing the piston to rise to its extreme height, carrying up the table 13, stripping posts 23, stripping late 22, flask 32, .and pattern 37. After t e lower ends of the stripping posts 23 have cleared 'the tops of the housings 21, the'pull bars 31 are shifted to dispose the supports 30 over the heads 27 The air is then releasedfrom the cylinder by closing valve 7 and opening valve 12 (or valve 9,.if pipe 11 is not provided), whereupon the lower ends of the stripping posts 23 rest upon the supports 30. If the weight carried by the piston is not suflicient to draw the pattern out of the mold, the spring 20 assists in starting the pattern; thereafter, the table and pattern descend by gravity with the piston, the strlpplng plate 22, flask and mold being supported as shown in Fig. 3, until the pattern is drawn and-the table has returned to nor-- mal position. The flask and mold may now be lifted by a crane or by hand from the stripping plate. Thereafter, the piston is run up again to its extreme height and the in Fig. 2 and the table is then lowered to normal position.

In my invention, the stripping posts are carried by the table 13 and may be placed' inwardly, or outwardly to accommodate the stripping plates and flasks of different sizes, all extraneous means for operating the stripping posts, as previously proposed in the art, being done away with.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a combination jolt-ramming and stripping machine, a table, means for jolting the table and for elevating it, said table being adapted to carry the pattern and the flask, and means; carried by and raised with the table adapted for being freed from the table and utilized for supporting the flask while the table is descending to draw the pattern from the mold.

2. In a combination jolt-ramming and stripping machine, atable, means for jolting the table and for elevating it, said table being adapted toicarry the pattern and the flask, stripping posts carried by the table and adapted to be raised thereby which are adapted to be freed therefrom so that the table may move in relation thereto, and means for holding the stripping posts while permitting descent of the table, whereby the stripping posts are adapted to support the flask and mold when the pattern is being drawn by the descent of the table.

3. In a combination jolt-ramming and stripping machine, a table, means for joltin the table and for elevating it, said table being adapted to carry the pattern and the flask, stripping posts loosely or slidably related to the table and suspended and car ried .thereby, and supporting means, whereby said posts are rendered adaptable to support the flask and mold on the descent of the table and pattern.

4. In a combination jolt-ramming "and stripping machine, a table, means for jolting the table and for elevating it, said table being adapted to carry the pattern and the flask, and flask supporting stripping posts carried by and raised with the table and adapted to be shifted laterally to different points thereof to accommodate flasks of different sizes, said table being movable up and down in relation to said posts.

5. In a combination jolt-ramming and stripping machine, a table, means for jolting the table and for elevating it, said table being adapted to carry the pattern and the flask, said table having vertical openings disposed at different points thereof, and stripping posts slidably and removably arranged in said openings and adapted to be shifted from one set of openings to another set to accommodate flasks of difierent sizes.

-6. In a combination jolt-ramming and stripping machine, a table, means for jolting the table and for elevating it, said table 'belng adapted to carry the pattern and the flask, upright housings, shiftable supports carried by said housings, and stripping posts slidably related to the table and carried thereby which are adapted to enter the housings when the supports are moved out of the way, said supports being adapted to be arranged to engage the stripping posts whereby the posts are adapted to support the flask and mold when the pattern is being drawn by the descent of the table.

In a combination jolt-ramming and stripping machine, a table, means for jolting the table and for elevating it, said table belng adapted to carry the pattern and the flask, upright housings, stripping posts slidably and removably carried by the table and adapted to be changed from one position to another on said table to accommodate flasks of different sizes, said posts being arranged so that they will enter the housings when in their different set positions, and means carried by the housings adapted to be arranged to engage and support the posts so that the flask will be supported when the pattern is being drawn by the descent of the table.

8. In a combination jolt-ramming and stripping machine, a table, means for jolting the table and for elevating it, said table being adapted to carry the flask, stripping posts loosely carried by and raised with said table for supporting the flask independently of the table when the table descends, and a combined spring cushion and stop carried by the table and arranged so that the spring cushion is first placed under compression before the stop arrests the extreme elevation of the table, whereby the spring cushion serves as an auxiliary means for starting the draw when the table descends.

In testimony whereof, I hereunto afiix my signature.

WILLIAM C. NORCROSS. 

